LS3 276cc CNC PORTED

$2,950.00

Designed for LS short-blocks with 4.000″ bore or larger

The 6-Bolt design is compatible with GM LSX & World LSX blocks
Available in 4 bolt design (Stock blocks)
Billet Rocker Stands
Accepts Gen IV LS3 valvetrain and intake manifolds
Uses a 2.165″ SS intake valve and SS 1.600″ exhaust valve
Ti and Inconel Valves Available
11 Degree valve angle
276cc CNC intake port
112cc CNC exhaust port
Has a 69cc CNC ported combustion chamber
Deck thickness of .750″

Springs/Retainers

BTR Platinum LS Dual Springs .660″ Lift (SK001)
.650 Max Lift recommended (upgraded PAC available)
.565″ ID Locator for Bronze Valve Guide
Viton high heat seal
GM Valve Lock
Chromoly Retainers
155 lbs @ 1.780″ 380 lbs @ 1.180″ 400 lbs @ 1.130 Coil bind @ 1.070″

Valves

Intake Valves: 2.165 x 5.45″
Exhaust Valves: 1.60 x 5.45″

Flow Bench: Superflo SF-102

Flow Plate Bore: 4.125″ @28″ H2O

Lift

.200″
.300″
.400″
.500″
.600″
.700″
.800″

Intake Flow

140 CFM
205 CFM
272 CFM
322 CFM
360 CFM
383 CFM
394 CFM

Exhaust Flow

103 CFM
140 CFM
184 CFM
221 CFM
253 CFM
265 CFM
274 CFM

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